Description
The ZL40518 is a laser diode driver for high speed operation of a grounded laser diode. The driver consists of 3 controllable channels: a switchable, low noise, read channel and two switchable write channels. Write current pulses are enabled with the application of a low signal on the /EN pins. A summed output of all channels is available at the IOUT pin. Each channel can contribute up to 250 mA to the total output current of up to 300 mA. A total read channel gain of 100 and write channels 2 and 3 with a gain of 250 and 150 respectively are provided between each reference current input and output.

Features
• Current-controlled Output Current source
• Output Current per Channel to 250 mA
• Total Output Current to 300 mA
• Rise Time 1.0 ns, Fall Time 1.1 ns
• On-chip RF Oscillator
• External Resistor Control of Oscillator Swing and Frequency
• 200 to 500 MHz Oscillator Range
• 100 mA Maximum Oscillator Swing
• Single +5 V Power Supply (±10%)
• Low-power Consumption
• Common Enable, Disable Input
• TTL/CMOS control signals
• Small SS016 Package

Applications
• DVD R/RW
• CD R/RW